12=-4+2a

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Solution for 12=-4+2a equation: 



12=-4+2a

We move all terms to the left:

12-(-4+2a)=0

We add all the numbers together, and all the variables

-(2a-4)+12=0

We get rid of parentheses

-2a+4+12=0

We add all the numbers together, and all the variables

-2a+16=0

We move all terms containing a to the left, all other terms to the right

-2a=-16

a=-16/-2

a=+8

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